By the time this is over some parts of the city will have over 8 feet of snow. The snow to water ratio is right around 11, so because the math is easier, I'll use a multiple of 11 inches. Assuming 55 inches as an average, you end up with 5 inches of water, or roughly 12.5 cm. The land area of the city of Buffalo (i.e., ignoring lakes, rivers, streams and suburbs) is 105 square km. The density of water is 1gm/cm^3, or 1000kg/m^3. Working the arithmetic, that results in 13,125,000,000 kg of water, or 28,875,000,000 lbs or 14,437,500 tons of snow. Of course, if you assume a higher average snowfall, the numbers just go up.